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This?
Another great use for a type of compostable plastic
Biodegradable baby shoes
(5 upvotes)Waterproof ‘plastic’ books
(5 upvotes)Pallet wrap that is biodegradable
(1 upvotes)Reusable bags made from vegetable starch
(3 upvotes)Supermarket bucket shopping to reduce packaging
(2 upvotes)Temprature indicator plastic cups
(-1 upvotes)Greenpeace charity shops
(20 upvotes)There are a few ways you can “waterproof” existing books, somewhat.
They exist. They don’t have to be plastic as such, but more like coated paper like modern bank notes.